Cap for lamp-shells, switch-receptacles, and analogous devices.



C. J. KLEIN.

CAP FOR LAMP SHELLS, SWITCH RECEPTACLES, AND ANALOGOUS DEVICES.

- APPLICATION FILED APR-8,1912.

1,142,818, Patented June 15, 1915.

THE NORRIS PETERS C0.. PHOTO-LITHCL. WASHINGTON, D C

lsa 8AT CHARLES J. KLEIN, OF MILWAUKEE, WISCONSIN ASSIGNOR TO THE CUTLER-HAMMER MFG. 00., OF MILWAUKEE, WISCQNSIN, A CORPORATION OF WISCONSIN.

GAP FOE LAMP-SHELLS, SWITCH-BEGEPTACLES, AND ANALOGOUS DEVICES.

Specification of Letters Patent. Patented June 15, 1915,

Application filed April 8, 1912. Serial No. 689,291.

To all whom, it may concern Be it known that I, CHARLES J. KLEIN, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Caps for Lamp- Shells, Switch-Receptacles, and Analogous Devices, of which the following is a full, clear. concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to caps for lamp shells, switch receptacles and analogous devices.

It has among its objects to provide a cap having improved means for securely holding an insulating lining within the same.

A further object of my invention is to pro- Vide a cap having lining retaining means which permit said lining to be readily inserted or removed when desired.

Other objects and advantages of my improved construction will hereinafter appear.

Two forms Which my invention may assume in practice are shown in the accompanying drawings.

In these drawings :Figure 1 is a vertical central sectional view of a lamp shell cap. Fig. 2 is a bottom plan view of the same. Fig. 3 is a transverse sectional view of a modified form of cap. Fig. 4 is a side elevation of the lining shown in Fig. 3. Fig. 5 is a side elevation of the cap shown in Fig. 3.

I will first describe the construction shown in Figs. 1 and 2, wherein the dome member 1 of the cap is provided with an insulating lining 2.

One or more struck out portions 3 are provided at or near the base of the dome member 1. These struck out portions are forced outward along horizontal cuts in the cap dome. This provides horizontally extending cut edges 4 outside of the inner periphery of the cap which cut edges serve as a support for the lining. The lining is provided with tongues 5 which snap over and engage with these out edges 4 to lock the lining in position. In a preferred form these tongues are formed by vertically slitting the lower edge of the lining as shown in Fig. 2 and the tongues are made resilient and given a slight outward flare.

When it is desired to secure the lining within the cap it is only necessary to insert the lining therein whereupon the yielding I tongues 5 snap over the cut edges 4 on the cap dome occupying the position shown in Fig. 1. edges of the tongues rest firmly upon the cut edges of the dome and securely lock the lining in place. It is to be noted that in this position the tongues 5 are housed within the struck out portions 3. Further by the provision of these struck out portions it is unnecessary to provide any indentations 1n the outer surface of the cap in which the materials used in finishing the cap may lodge and thus mar the appearance of the When in this position the lower cap is provided with struck out portions 6 which are forced out from L-shaped cuts in the cap providing horizontal cut edges 7 for supporting the lining as above described, and vertical cut edges 8 for a purpose hereinafter set forth. In this instance the tongues 9 on the insulating lining extend horizontally instead of verticallyv as in the former construction and are formed by providing L-shaped cuts 10 in the lining (see Fig. 4.) To look the lining in place in this construction the lining is first inserted and then rotated until the vertical edges thereof engage the vertical cut edges 8 on the cap in which position the horizontal free edges on the lining engage the horizontal cut edges'on the cap to support the lining Within the latter. When it is desired to remove the lining it is only necessary to slightly rotate the same in the reverse direction, whereupon the tongues 9 are forced inward by engagement of the inner walls of the struck out portions disengaging the tongues from the horizontal cut edges 7 on the cap and leaving the lining free to be withdrawn.

In thus disclosing my invention I have not attempted to describe all of the modifications of the same which may be made without departing from its spirit.

What I claim as new and desire to secure by Letters Patent is as follows 1. In combination, a casing cap having struck-out portions and cut-metal edges beneath said portions, and a fibrous insulating lining having yieldable tongues resting upon said edges for retaining said lining in said cap.

2. A casing cap having struck-out por tions providing cut metal edges opposed to said portions, and an insulating lining having tongues adapted tosnap over said edges and be housed in said struclpout portions.

3. A casing cap having a pluralitv of transverse slits in its Wall, themetal at one side of said slits being struck out and an insulating lining having tongues adapted to be received in said struck-out portions and to rest u'ponthefmetal at the opposite side of said slits to hold said lining against accidental rotation vvithin and against removal from sa d cap.

4;. A casing cap havlng 1nter1or recesses and adjacent transverse and vertical out metal edges and an insulating lining having tongues supported by said transverse edges and held against rotation by said vertical edges When in position in said cap.

5. A casing cap having a plurality of L- shaped slits in its Wall, the metal at one side of said slits being struck out, and an insulating lining Within said cap and having struck-out portions rotatable into or out of looking engagement With the out metal edgesof said cap at one side of said slits.

In itness whereof, I have hereunto subscribed name in the presence of two Witnesses.

" CHARLES J. KLEIN. l/Vitnesses:

"FRAN H. HUBBARD, val (ROCKWELL.

Copies; of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. G. 

